Re: Marx using inductors (fwd)

["High Voltage list" <hvlist@xxxxxxxxxx>]

Original poster: Steven Roys <sroys@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Sun, 25 Jun 2006 12:11:58 -0500
From: Dr. Resonance <resonance@xxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: Marx using inductors (fwd)




I have developed a unique multiplier circuit that uses a center-tapped 
transformer such as a NST or X-ray transformer, and then produces a 
single-ended output (hot to ground).  If you need the circuit contact me 
off-list and I will email it to you.  You use your entire NST or dental 
X-ray transformer, not just 1/2 of it.  It requires a few extra diodes and 
caps but it works very well.

BTW we stock HV diodes and MMC caps for HV applications --- both standard 
and fast recovery types in stock.

Dr. Resonance




> Original poster: Steven Roys <sroys@xxxxxxxxxx>
>
>
>
> ---------- Forwarded message ----------
> Date: Fri, 23 Jun 2006 10:54:27 +0800
> From: Peter Terren <pterren@xxxxxxxxxxxx>
> To: High Voltage list <hvlist@xxxxxxxxxx>
> Subject: Re: Marx using inductors (fwd)
>
> Never made a Marx myself but I would have thought it wise to have the
> driving voltage referenced to ground.  Otherwise any sparks or leakage
> currents from the output to ground will blow diodes in your multiplier. So
> you need to use only half of your NST to keep the ground reference.
>
> Peter
> .
> ----- Original Message ----- 
> From: "High Voltage list" <hvlist@xxxxxxxxxx>
> To: "hvlist" <hvlist@xxxxxxxxxx>
> Sent: Thursday, June 22, 2006 9:42 PM
> Subject: Re: Marx using inductors (fwd)
>
>
>> Original poster: Steven Roys <sroys@xxxxxxxxxx>
>>
>>
>>
>> ---------- Forwarded message ----------
>> Date: Wed, 21 Jun 2006 13:14:48 -0700
>> From: Jonathan Peakall <jpeakall@xxxxxxxxxxxx>
>> To: High Voltage list <hvlist@xxxxxxxxxx>
>> Subject: Re: Marx using inductors (fwd)
>>
>> Thanks for all the replies.
>>
>> While digging around I came across some HV (I think) resistors. I am not
>> sure if they are wirewound. They are marked :
>>
>> CVD 1%
>> RN30X
>> 5004F
>> 5M
>>
>> Thet are about 52mm/2" long and they do indeed measure 5mOhm as the 5M
>> suggests. I have 20 of them. Would it matter if they are wire wound or
>> not?
>>
>> As for the rest of the system, I was thinking of using a 12/120 NST that 
>> I
>> have, running it into a voltage doubler. If I did the mat right (always
>> doubtful) I should wind up with about 33.6 kV. That leaves me a little
>> more
>> margin for the caps than I'd like, but a 15/120 NST would be 42kV, too
>> high
>> for the caps.
>>
>> If I did use the resistors rather than inductors, how would I calculate
>> the
>> break rate, assuming the 12/120 NST, a voltage doubler and the 5mOhm
>> resistors? I realize factors like corona loss, etc, will come into play,
>> but
>> just looking for a way to ballpark it.
>>
>> As to the inductors, I had thought about ferrite cores, but for some
>> reason
>> figgered that that wouldn't be OK. Of course, unless I can scrounge the
>> ferrite slugs they will add cost too. Any figures on what the minimum
>> usable
>> inductance is?
>>
>> Thanks for all the suggestions. I will indees use Tesla coils style
>> construction, sand and finish the PVC and make  2-3 stages first and work
>> out the kinks.
>>
>> Jonathan
>> www.madlabs.info
>>
>>
>>
>>
>>
>> -- 
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